Computer display screen portion with transitional graphical user interface



FIG. 1 is a front view of a computer display screen portion with transitional graphical user interface showing a first image in a sequence of a first embodiment;

FIG. 2 is a front view of the computer display screen portion with transitional graphical user interface showing a second image in the sequence of the first embodiment;

FIG. 3 is a front view of a computer display screen portion with transitional graphical user interface showing a first image in a sequence of a second embodiment; and,

FIG. 4 is a front view of a computer display screen portion with transitional graphical user interface showing a second image in the sequence of the second embodiment.

The subject matter in this patent includes a process or period in which an image changes into another image. The process or period in which an image transitions to another image forms no part of the claimed design.

The broken lines illustrate environment and form no part of the claimed design. 

CLAIM The ornamental design for a computer display screen portion with transitional graphical user interface, as shown and described. 